Illustration of polyhedron
polyhedron
noun
poly·he·dron
ˌpä-lē-ˈhē-drən 
plural polyhedrons or polyhedra
ˌpä-lē-ˈhē-drə
: a solid formed by plane faces
Examples of polyhedron in a Sentence
Recent Examples on the Web
Perhaps the greatest long shot was the Bone Conductive Instrument, a wooden polyhedron designed to be held snugly to the breast, with the side of one’s face resting atop it, almost like an infant.
—
Matthew Sherrill, Harper's Magazine, 19 Feb. 2025
Euler implicitly assumed his polyhedra were convex, meaning a line segment joining any two points stayed completely within the polyhedron.
—quantamagazine.org, 26 Jan. 2021
Mold that box into a pyramid or tetrahedron or any other everyday polyhedron.
—Devin Powell, Discover Magazine, 20 Mar. 2019
This polyhedron is a classic prism made from professional-grade optical crystal glass.
—Popular Science, 23 Oct. 2019
The 20th-century mathematician Aleksandr Aleksandrov proved that for every two-dimensional polygon, there is one unique way of folding it to form a 3-D polyhedron.
—Quanta Magazine, 5 Jan. 2017
And the circle packing proof tells you that there’s a polyhedron that has all its edges tangent to a sphere.
—Quanta Magazine, 19 Mar. 2018
The printer cranks out up to 150 polyhedra each year – everything from models of protein crystallography to Mars' topography.
—Stacey Smith Lang, WIRED, 1 Nov. 2001
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Matthew Sherrill, Harper's Magazine, 19 Feb. 2025
Euler implicitly assumed his polyhedra were convex, meaning a line segment joining any two points stayed completely within the polyhedron.
—quantamagazine.org, 26 Jan. 2021
Mold that box into a pyramid or tetrahedron or any other everyday polyhedron.
—Devin Powell, Discover Magazine, 20 Mar. 2019
This polyhedron is a classic prism made from professional-grade optical crystal glass.
—Popular Science, 23 Oct. 2019
The 20th-century mathematician Aleksandr Aleksandrov proved that for every two-dimensional polygon, there is one unique way of folding it to form a 3-D polyhedron.
—Quanta Magazine, 5 Jan. 2017
And the circle packing proof tells you that there’s a polyhedron that has all its edges tangent to a sphere.
—Quanta Magazine, 19 Mar. 2018
The printer cranks out up to 150 polyhedra each year – everything from models of protein crystallography to Mars' topography.
—Stacey Smith Lang, WIRED, 1 Nov. 2001
Cite this Entry
“Polyhedron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polyhedron. Accessed 30 Jun. 2025.
Copy CitationKids Definition
polyhedron
noun
poly·he·dron
ˌpäl-i-ˈhē-drən
plural polyhedrons or polyhedra
-drə
: a geometric solid whose faces are each flat polygons
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